Control circuit for telephone systems



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CONTROL CIRCUIT FOR TELEPHONE SYSTEMS Original Filed May 5, 1945 53 Sheets-Sheet 9 /N l/E/v TOR J ODHEPHER arch 4, 1952 J. o'D. SHEPHERD CONTROL CIRCUIT FOR TELEPHONE SYSTEMS 53 Sheets-Sheet l0 Original Filed May 5, 1943 A. Sog

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CONTROL CIRCUIT FOR TELEPHONE SYSTEMS Original Filed May 5, 1943 55 Sheets-Sheet ll ,wa/5N To@ J O0. SHEPHERD A T rom/Er arch 4, 1952 0'D SHEPHERD 2,588,952

CONTROL CIRCUIT FOR TELEPHONE SYSTEMS Original Filed May 5, 1943 55 Sheets-Sheet l2 VVE/wo@ J OD SHEPHERD A TTOR/VEV 4, 1952 J. o'n. SHEPHERD 2,588,052

CONTROL CIRCUIT FOR TELEPHONE SYSTEMS Original Filed May 5, 1945 53 Sheets-Sheet 13 T0 OTHER P' RELAYS ONE FR EACH PIP/MARY SWITCH N VE N TOR 5 J o HEPHERD n. 1 y19V A 7' TOR/VEY 4, i952 .1. OD. SHEPHERD 2,588,052

CONTROL CIRCUIT FOR TELEPHONE SYSTEMS Original Filed May 5, 1945 55 Sheets-Sheet 14 /Nn/E/v To@ J OD. SHEPHERD ATTORNEY arch 4, 1952 J. O'D. SHEPHERD CONTROL CIRCUIT FOR TELEPHONE Original Filed May 5, 1943 SENDEN GROUP SENDER L INI( SYSTEMS 55 Sheqts-Sheet l5 T0 lNTERL/NK 2 mvg/won O'D EPHERD ATTORNEY arch 4, 1952 J. o'D. SHEPHERD 2,588,052

CONTROL CIRCUIT FOR TELEPHONE SYSTEMS original Filed May 5, 1945 5s sheets-sheet 16 March 4, 1952 .1. oD. SHEPHERD CONTROL CIRCUIT FOR TELEPHONE SYSTEMS 55 Sheets-Sheet 17 Original Filed May 5, 1945 /NI/ENTOR -JOD. EPHERQ A from/5v MalCh 4, 1952 J. oD. SHEPHERD 2,588,052

CONTROL CIRCUIT FCR TELEPHONE SYSTEMS Original Filed May 5, 1943 55-Sheets-Sheet 18 /A/ VEN ou @PHE/P0 March 4, 1952 J. oD. SHEPHERD 2,588,052

CONTROL CIRCUIT F OR TELEPHONE SYSTEMS Original lFiled May 5, 1943 53 Sheets-Sheet 19 /N VE N TOR J. O'D. SHEPHERD CONTROL CIRCUIT FOR TELEPHONE SYSTEMS March 4, 1952 53 Sheets-Sheet 20 Original Filed May 5, 1943 /NVEN TOR SHE PHE R0 ATTORNEY 

